Motor for railway-gate equipment



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Kl entor Nov. 16 1926.

C. W. BUTTRICK MOTOR FOR RAILWAY GATE EQUIPMENT Filed April 1?, i922 :5 Sheets-sheet 1 8 m) 671M155 14/ Burr/war Nov. 16 1926.

c. w. BUTIRICK mo'roa FOR RAILWAY GATE EQUIPMEKT Filed April 1'7} 1922 s sheets-sheet 2 Nov. 16,1926. 1,606,985

- C. W- BUTTRICK,

MOTOR FOR RAILWAY GATE EQUIPMENT Filed April 17, 1922 3, Sheets-Sheet 5 Q I la, I

Wamssas INvENToH CHAHLEs IWBUTTFTICK I y y l mented Nov, 16, 1926. V r p s v I I I V STATES; PATENT-OFFICE."

CHARLES W. BUTTRIOK, or SPRiNGE IELD, ILLINoIs.

- time Lees-s MOTOR FOR BAlILWAY-GATE EQUIPMENT;

Application filed April 17, 1922. Serial No. 553,623.

v T he invention relates to hydraulic motors employing fluids in motion to actuate gates or other mechanism and is primarily intended to be installed at places where highways cross railway tracks; but is obviously adapted for use in various and different situations. r

For convenience I will describe an installation using oil as the flowing fluid, but

able fluid may be used.

itis to be understood that any other suitsuitable for the purpose because it is relatively cheapand obtainable everywhere, is not easily volatile or explosive, and is safe and dependable under all ordinary conditions of use. 7

The purposes of the invention are: to provide a reservoir-containing a supply of oil in conjunction with a pipe system di-' renting the flow of 011 from the reservoir remote from the source of supplyandre ceiving'fiuid from the respective pipe lines:

' an even number of sets of car-wheel-actuated' pinup-units receiving fluid from the pipe lines, I duplex pumps, motors rece ving. flu d from the duplexpipe line s, air chambers receiv-.

ing fluid' from said motors, *and gate mechani'sm actuated by said motors, one of sald duplex pumps 1n each pump-un1ti being effective topropel fluid through one pipe line into one end of a. motor cylinder and the other duplex pump of the samepump-unit being effective to propelfluid through the other pipe line of 'the'duplex into the other end of the same motor cylinder; and to-provi de other new and useful structural'details.

With these ends in view, the invention consists in the novel features of construction and combinations of partsshownin'the accompanying drawings, to which reference is hereby made, and said invention will now be fully described and finally recited in the claims. I

Figure 1 is a top plan. view of a fluid motor and appurtenances embodying my invention; Fig. 2 is a fragmentary vertical sec- Oil is specially each pump-unit "comprising" tion taken on the line 2-2 of Fig. 1; Fig.

'3 is a vertical section taken on the line 3-'3 of Fig. 1; Fi his an enlarged vertical axial section through one air chamber taken on the line 44" of Fig. 1, and shows .details of the valve connected with the air chamber; Fig. 5 is a diagrammatic vertical axial section through the reservoir, some of the parts being shown in elevation; Fig.6 is an enlarged side elevation of one .air dome; Fig. 7 is a vertical section'through the sameair dome, taken on the line 77 of Fig. 6, and Fig 8 1s mdragram showing motors, pump-units, pipe line, a1r domes, and a reservoir, each other;

The same reference numerals and letters designate'the same. parts in all the views. The motor, designated as a whole by the letter M, comprises a cylinder .40,

in operative relation to cylinder heads tl and 42, secured at the respective ends'of the cylinder, a piston 43 slidable in the cylinder, spiders 44 and 4-5 .lixed in the cylinder; each spider having elongated longitudinally bored hubs; and

two tubular piston rods 46 and47 in line,

with each other, one slidable in the longitudinal bore'of the spider 14A and the other slidable "in the longitudinal bore of the spider 45.

The piston" 43 has a longitudinal bore 4.8, and counter bores 49 and 50 to receive the inner ends'of the respective piston rods.

A transverse hole S I exteirds through the All rod 6 adj acent'to the inner end of the spider I ttaiid a similar transversehole 52 extends through tlie'rod 4;? adjacent to the outer end ofthe spider45l H I ."When "the gate" 18 (Fig. 8) is extended in closed position, the piston 43 Will occupy the position shown in full lines in Fig. '0

and when the, gate is raised in open posit.

tion, the piston will be. in the position in dicated'by'dotted lines infFig. 8.' Oil under pressure,applied byoneor'more pumpunits as hereinafter described, ifsfadmitted into the cylinder tO. through an opening 56 and acts on the left-'l1and end of the piston to slide it-to thelright; and similarly, oil. under pressure, applied by one orfm'ore pump-unitsenters through the opening '55 and acts on the right-hand end ofthe piston lS to'sli de it to the left, Y

After .pre'ssure'has been applied: to move the piston 43 one direction it is necessary toequalize the pressure on both ends of the piston so that it will be freeto move in either direction. For this purpose I provide the leak openings 51 and 52 inthe respective tubular stems 46 and 17. When the parts are in the position shown in Fig. 3 i't the greater pressure is on the right-hand end of the piston 43, oil entering the hole 51 will same cylinder. This result is effected by an.

equalizer which will now be described. The equalizer and eppwr'temmces.

The equalizer 2) comprises pipes 57 and 58 delivering oil through. the respective openings ant. 56 into the cylinder ac; air tanks 59 and 60 communicating with the interior of the cylinder -10 through pipes 61 and 62 attached at the respective ends of the cylinder and conveying oil from the cylinder into the respective tanks; a valve 53 controlling communication between the chamber 59 and the pipe 61; a valve 5% controlling communication between the chanher 60 and the pipe 62; d-iaphragms 63 and 64;, preferably in tll.6 f01'111 of corrugated copper disks, enclosed in suitable casings 65' and 66; a bar 67 having its ends brazed at the centers oi the respective corrugated :disks 63 and 64 and slidable in hubs 68 at the centers of the inner members of the respective casings 65a-nd 66; a lateral. pipe 69 permitting'inward and outward flow of oihtlrrough the pipes 57 and 69' into and from the chamber 71; a lateral pipe permitting inward and outward flow of oil through .the pipe 58 and 70 into and from the chamber 72; an arm 73 fixed on the bar 67 midway between its ends; and a horizon- ;tal rod 7 1 (Figs. 1 and 2) fixed onthe arm 7 3 and having its terminals operatively connected with the respective levers 75 and 76 which are fixed on the stem 77 of the valve v53 (Fig. 4) and on a similar stem (not shown) of the valve 5 1. When the arm 73 is in its intermediate or neutral position as shown in Fig. 2, the piston 4-3 will be adjacent to one end ofthe spider 45, or adjacent to one end of the spider 414 as the case may be; thepressure will be equal on both e'ndsof the piston andthe pressure on both diaphragms 63 and 64 will be equalized by transference of oilthrough the tubes-46 and 47 as already described" and both valves and 54-. will be partly open, there will he equilibrium of the oil in the cylinder- Valves-53 and 54 adjacent to the respective air chambers 59 and 60fcontrol communication between the air chambers and the pipes 61 and 6.2 at the respective ends of the cylin der 40. Both valves are alike, except that one is right and the other left; so a description oi one will suffice for both. The valves 53 and 54 act reversely; that is to say, when the valve 53 is completely open, the valve 5% will be completely closed and when the valve 54: is completely open, the valve 53 will be completely closed. Details of the valve 53 are shown in Fig. 1 and will now be described. The valve body 53 is a globu lar hollow casting suitably 'con'nectedwith the air chamber 59 and the pipe 61. A trans verse shaft 77 oscillates in suitable hearings in the valve body and extends outwardly beyond the valve body. A lever 75 is fixed on the shaft 77 and is pivotally connected with the rod 74. A slotted arm 131 is fixed on the shaft 77.

nected with the arm 131 by a pin 133. A

disk 134; is fixed on the stem 132, and engages on a valve seat 135 in the valve body. There are two spiders 137 in the valve body and. each has a central hole in which the valve stem 132 slides.

When the pressure of oil in the chamber 72 acts on the diaphragm 64L to move the bar 67 to the right .(Fig. 2) the arm 73 carried by the bar will cause the rod 7.4 to push the lever 75 to the right, with the result that thezarm 131 will turn downwardly and pull on the stem 132 to withdraw the disk 13% from the valve seat 135, thereby permitting excessof oil from the right-hand half of the cylinder 16, entering the valve through the pipe 61-to go into the air chamber 59 against the air pressure therein thus avoiding excessive pressure in the cylinder 4O and when the pressure is reduced to normal, reverse movement of the lever 7 5 effected by the arm 73 moving to the le'lt, responsive to the pressure of oil in thechamber 71. against the dia phragml63, will result in replacing the disk 134sonthe seat 135'.

A rack bar 8O pivotally connected with thepiston rod 40, engages with asuitable gear 86, to operate the driven mechanism.

The motor is actuated by wheel-actuated pump-units 20, each of which consists of two oppositely acting pumps 27 and 28, one ei ifective to force fluidinto onefend of the motor cylinder when. the o .)erating train isgoing in one direction, and the other effective to force fluid into the other end' of the motor cylinder when :the operating train is going in the opposite direction.

in order to describe clearly the mode of operation of the motors vM, I have indicated conventionally, in Fig. 8, red pumps 27 and black pumps 28.; and have indicated by broken and dotted lines the red pipes 22 black pumps.

A valve stem 132 is conpump-units and the motors. V actuated duplex pumps 27 and 28 are so con preferred installation embodying the present invention is shown diagrammatically in Fig. 8.

containing oil under air pressure,to supply loss and maintain a proper supply of oil throughout the system; gate stand 16 I and 17; motors M; four sets of pump-unit s 20, two sets adjacent to each track, each pumpunit consisting of duplex pumps 27 and 28 operated by a lever 112 actuated by the flanges of car wheels running on thetrack 'rails 13 or 14, as the casemay be; duplexpipe lines 21 and22; 23 and'24'; and 25 and 26 pperatively connecting the reservoir the The 1 wheelstructed and arranged that when thepump 270i any unit 20 is active, the complemental pump 28 of the same unit will be inefi'ective; and reversely, when the pump 28 of the same unit is active the pump 27 will be ineffective. All thepumps 27 of one series ofpump-units propel oil enteringonee'nd of the corresponding motor cylinder 40; and all the pumps 28 of the same series propel oil entering into the other end of the motor cylinder; The flanges of the wheels 7 of cars running on the track rails in one direction actuate the respective levers 112 to operate the red pumps in succession; and

the flanges of the car-wheels running in the opposite directionvon the same track rails act on the same levers 112 to operate'the black pumps 28, to deliver fluid intothe other end of the same motor cylinder.-' The even number of pump-units.

two pumps 27 and 28 comprised in a single pump-unit 2O areduplex pumps in that they are similar in construction and co-act in such manner that when one is etf-ectivethe other is ineflfective;and similarly red pipe lines'21 and 22; 23 and 24; and 25'and 26,;are duplex pipe lines, in that they admit ofrthe surge of oil from the red pumps into one end of the cylinder of the motors M,.to-efte'ct closing otthe duplicate gates 18 and, 1 9;

' and admit of the surge of oil from the black pumps28 into the other end of the cylinder of the same :motors M, to effect opening of the same duplicate gates.

' I have shown four sets of pump-units, each set'comprisingi four pump-units, but

.each'set may comprise a greater or-a less,

Inasmuch as, there are a number of pumpunits in each setit is obvious that, successive lncrement-s'of flu d will be forced into the motor cylinder by successive actions-of the: pumps and the pressure 1 in the cylinder will be cumulative, thereby avoiding abrupt action of the motor and consequent shock and strainon the mechanisnmi Immediately following the operating of a'nyi'pump-unit of the system, the compressed air in the reservoir 15 and'the' air cushions in the air The installation comprisestwo railwayv tracks 13 and 14, a-reservoir dome136. will beefiective to equalize fluid pressure throughout the system.

, The reservoir 15 preferably an air-tight cylinderof boiler plate, adapted to con tain a volume of oil sufficient to compensate for leakage throughout the system; and a volume of compressed air above the oil, ef fective to maintain practically "constant pressure'throughout the system.

' The reservoir is equipped with a pipe 127, in communication with the interior of the reservoir and with the elements 150 and 151 p of the pipe system." A valve 152 controls the flow of oil in the pipes 127 and 150; and a similar valve 153 controls the flow of oil iii-the pipes 127 and 1'51. The valves 152 and 153 (Fig. .5) open outwardlyin order that if the pressure in the pipes 150 and 151, or either of-them is less than normal, the valve or valves will open to admit oil from the vreservoir into either pipe or 'both pipes, as the. case may be, to replacelostv of the respective pipelines which are remote from the air reservoir. The air domes are all alike so only one need befdescribed. The air domeconnected with the pipeline 26- comprises aY-dome-shiaped, castiin'g 136 (Figs, 6, 7,.and 8) open at on eend and having a circular, flange 137 atthe'open end, An elbow 138fhas'fianges139 and 140. The vflange 139 is connected with the flange 137 by bolts 141; andithe flange 140' is connected with a flange'142, on the. pipe 26 by bolts '143. hen the pipe lines are full of oil, a volume of air will be trapped in each ldome136, and iinxcase of eXcesisivepressur-e in the pipe, the trapped air in the dome will be compressed to: a degree suflicient to avoid undue strain on'thepipes V DlVlSlOIl having'been required'ln this case,

reference is hereby; made ,to my application Serial No. 664,537, gate equipment for railways, filed S'eptl 24,'1-923,allowed Dec. 24,

1924; and my application Serial No. 669,001,

pump-unit for railway equipment, filed Oct 15, l923, and,all owed May 12th,1925., Both of my said divisional applications were derived I from my present application Serial No. esaeaeifiied April-4,17, 1922.

l l'aving iully described my lnve ntionjwhat I claim as new and desire to secure by Let- 1 't-ers- Patent is; P y Ina railway gate equipment, in com bination with a reservoir: containing, oil

under compressed air, and alpipe ,system for conveying oil; ane'nglne cylinder, a piston slidable in the cylinder; air chambers adjacent to therespective ends of the cylinder; valves inter-communicating between inder't-o the respective diaphragmchambers to equalize pressure on the respective dia- 12. An engine comprising a. cylinder; a piston shdable in the cylinder; spiders staphragms in, said diaphragm Cl'IZU'IIbK-BI'S.

' tionary' in the'cylinder, one on each side of the piston; perforated transfer tubes slidable in said spiders and adapted to transfer oil from one side of the piston to the other side of the same piston according to the movement of the piston in the'cylinder to equalize pressureon bothsides of the piston;

3. In an installation of the class described, a reservoir containing oil and com pressed air above the oil; a plurality of pipe lines receiving oil from the reservoir; hydraulic engines receiving oil from the pipe lines; and air doines at the terminals otsaid pipe lines.

111 an equipment of the class described, the combination of a reservoir containing oil and compressed airabove the oil; duplex pipe lines receivingoil from the reservoir; air domes at the terminals or" said duplex pipe lines a hydraulic'motor' actuated by fluid transmitted through said duplex pipe lines; air chambers co-acting Withsaid mo tor to equalize fluid pressure Within the motor; 'duplex' series of Wheel-actuated pump-units. receiving oil from the" duplex pipelines, each punip-unit comprising two um s one o e'rative b car Wheels l 'oin in one direction andthe other operative by car Wheels going in the opposite direction; and one recelving oil from one of said duplex pipe lines and delivering it into one end of the motor, and the other receiving oil from the otherof said duplex pipe. lines i and delivering it into the other end of the motor. Q a a V i ,5. In an installation of the class described, the combination of a reservoir containing oil and compressed air' above the oil; a

plurality of pipe linesreceiving oil .fronr the reservoir; hydraulic motors receiving oil from the reservoir through the pipe lines; and heel-actuated means for forcing fiuid from the pipe lines into the motors.

" 6. In an installation of the class described,

the combination of a hydraulic motor combination with a reservoir containing fluid under compressed air, and apipe system for conveying fluid anengine" cylinder, a pis ton slidable in the cylinder; air chambers adjacent tothe respective ends of the cylinder; valves inter communicating between the interior of the cylinder and the interior oi the rcspective air chambers; transfer pipes comn'iunicatingwith 'theinterior of the cylindeiyone' on each side ofthe piston and connnunicating through the cylinder with diaphragm chambers in line With each other; diaphragm's in the respective diae 'phragm chambers; a bar connecting said diap-hragms"; an arm secured on said bar; rod cai'rie'd bysaid arm and effective to operate "the valves adjacent to both air chambers, totransfer fluid from the engine cylinder to the respective diaphragm chainbers to equalize pressure" on the respective diaphragms in said diaphragm chambers.

' An enginec'omprising' a cylinder; a piston slidableinthe cylinder; spiders sta' tionary in the cylinder, one on each side of the piston; perforated transfer tubes slidable in said spiders and adapted to trans ferfluid from, one side of the piston to the other side" of, the same piston according to the movement of the piston in thecylinder to equalize pressure on both sides of the piston.

' 9. an installation of the'cl'ass described,

a reservoir containing fiuid'and compressed air above the fluid ;-a plurality of pipe lines receiving fluid from the reservoir; hydran lic engines receiving fluid-iroin'the pipe lines; and air d'omes'at the terminals of said pipe lines.

10; In an installation of the class described, the combination of a reservoir containing fluid and compressedair above the fluid; a plurality of pipe lines receiving fluid from the reservoir; hydraulic motors receiving fluid from the reservoir through the pipe lines; and wheel-actuated means for forcinga fluid from the pipe lines into the motors. 4

, In itness whereof I havehe'reunto signed my name at Springfield, Illinois, this 15th day of April, 1922. i

I CHARLES WV. BUTTRICK. 

